PTEROMALIDAE OF N.W. EUROPE 257 



TYPE ; it is labelled " 38. 7. 12. 79 ", " Clermont, France ", and also bears a 

 Waterhouse label. 



Semiotus praestans Walker. Syntypes, 2 (J, 2 $. LECTOTYPE, the first female, 

 bearing a Waterhouse label. 



Semiotus quadratus Walker. Syntypes, 7 specimens. LECTOTYPE, the fourth, 

 a female bearing a Waterhouse label. It is probably within the range of variation 

 of mundus. 



Semiotus maerens Walker. Syntypes, 3 <$. LECTOTYPE, the third ; Waterhouse 

 label. 



Pteromalus punctifrons Nees. Types lost. 



Pteromalus japis Walker. One male, LECTOTYPE ; Waterhouse label. 



Semiotus tauriscus Walker. One male, designated LECTOTYPE. ; bears a green- 

 bordered " Type " label, also a printed one " Tauriscus ". 



Semiotellus punctifrons Thomson. Syntypes on 25 pins. LECTOTYPE, a female 

 labelled " Rsio " [Ringsjon]. 



This is a very common species (at least in Britain) and also extremely variable in 

 size, colour of body and legs, size of wings and proportions of the flagellar segments 

 of the antennae. All these variations seem to me to be within the range of variation 

 of one species ; at all events the different forms cannot be separated at present by 

 any reliable characters. 



Britain, Ireland, Sweden, France ; no doubt widely distributed in Europe. 

 Biology. Unknown. Imagines May-Aug. (mostly June-July). 



Semiotellus laevicollis Thomson 



Semiotellus laevicollis Thomson, 1876a : 203, o* $. 



Type material. Syntypes, 6 $ and 1 <J. LECTOTYPE, a female labelled " Esp " 

 [Esperod]. 



I retain laevicollis for the present as a valid species, though I am not sure whether 

 it might not be a habitat-form of mundus, dwarfs of which approach very closely to 

 the larger specimens of what I am calling laevicollis. I have taken several specimens 

 of both sexes of laevicollis in Britain (on chalk-downland in Oxfordshire, on moorland 

 in Perthshire, Scotland). 



Britain, Sweden ; very local. 



Biology. Unknown. Imagines in June. 



SYSTASIS Walker 



Sy stasis Walker, 1834 : 288, 296. Type-species : S. encyrtoides Walker, by designation of West- 

 wood, 1839 : 70. 

 Systasis Walker ; Thomson, 1876a : 193, 203. 

 Syntasis [sic] Walker ; Ashmead, 1904 : 274, 275. 

 Systasis Walker ; Schmiedeknecht, 1909 : 275, 276, 280. 

 ? Guieralia Risbec, 1951 : 253. Type-species : G. guierae Risbec, by monotypy. 



